shmall and shmmax

ynn · Post by **ynn** » Fri Aug 03, 2007 5:45 pm

I have 1 gig of RAM, what is the max shmall and shmmax I can put bigger than 134217728 , because It seems always give me an error 'Can't shmget: Invalid argument' on peak time.

thanks.

voronwe · Post by **voronwe** » Sat Aug 04, 2007 9:12 am

Hi Ynn

My normal practice is to assign half of the system memory as shared memory.

That seems to fix most of my shmget problems.

For a 1024mb system that results in my sysctl file having the following values:

Code: Select all

kernel.shmmax=536674304
kernel.shmall=536674304

ynn · Post by **ynn** » Sat Aug 04, 2007 9:49 am

thank you for your help.

Athlon64 · Post by **Athlon64** » Sat Jan 03, 2009 4:10 pm

My camera server has 4GB RAM. It's going to run a Zoneminder system connected up to seven 1.3MP Axis cameras. What values should I give kernel.shmmax and kernel.shmall for my setup?

Post by **cordel** » Sun Jan 04, 2009 3:24 am

See the calculation description in the FAQ: Shared Memory